You should be able to check the brake shoe lining thickness after removing the brake drum. Check the Brake Specifications chart at the end of this section to find the manufacturer's wear limits. However, this measurement may disagree with your state inspection laws. When replacing brake shoes, always check the surface of the brake drums for scoring or wear. The brake drums should resurfaced or machined if badly scored.
REMOVAL & INSTALLATION
See Figures 1, 2 and 3
If you are not thoroughly familiar with the procedures involved in brake replacement, disassemble and assemble one side at a time, leaving the other wheel intact, as a reference. This will reduce the risk of assembling brakes incorrectly. Special brake tools are available to make this repair easier. Refer to the illustrations _ modify service steps for removal and installation.
- Raise the vehicle and remove the wheels.
- Release the parking brake. Disconnect the cross rod from the lever of the brake cylinder if so equipped. Remove the brake drum. Place a heavy rubber band or clamp around the wheel cylinder to prevent the piston from coming out.
- Remove the return springs, adjuster assembly, hold down springs and brake shoes.
- Clean the backing plate and check the wheel cylinder for leaks.
- The brake drums must be machined if scored or out of round.
- Hook the return springs into the new shoes. The return spring ends should be between the shoes and the backing plate. The longer return spring must be adjacent to the wheel cylinder. A very thin film of grease may be applied to the pivot points at the ends of the brake shoes. Grease the shoe locating buttons on the backing plate, also. Be careful not to get grease on the linings or drums.
- Install the adjuster assembly (rotate nut until adjuster rod is at its shortest point) between brake shoes. Place one shoe in the adjuster and piston slots, and pry the other shoe into position. Install hold down springs.
- Replace the drums (adjust wheel bearings if necessary) and wheels. Adjust the brakes. Bleed the hydraulic system if necessary.
- Reconnect the handbrake, making sure that it does not cause the shoes to drag when it is released.